You may want to check the specific model you're looking at, because I don't think any right now give you a truly free internet experience. Just certain internet "apps".
I have a BluRay that connects with Ethernet. And it's just sorta "meh."
Yeah, it has YouTube and Netflix apps, but I don't have Netflix, and I don't use any of those apps because...
I also have a computer hooked up to my 56" via HDMI. I watch all my "borrowed" movies on it. And can go to the actual YouTube (as well as Hulu, etc.), or TigersX for that matter.
This is what I have.
http://www.newegg.com/Product/Product.aspx?Item=N82E16883103234They're apparently discontinued and hard to find, but if you can come across one, I highly recommend it.
And let me know, because I want another for my other TV.